I found it to be a fascinating read, despite its length. Some of the data he presented is quite astonishing - e.g. "In 2014, 636,000 migrants came to live in Britain, and 27 percent of births in Britain were to foreign-born mothers." The comments are for the most part of a similar quality. Dalrymple is quoted perhaps half a dozen times, and there are complimentary references to another article ("The Diversity Myth: America’s Greatest Export") by the same author, which I have not yet read.

In particular, the sections on the economic effects of mass migration (mixed, at best) are well worth studying.

Two points:

1) As you say, the article is full of eye-opening data. The most important statistic, however:

“a staggering 71 percent of the total voting-age population believe immigration is the most urgent problem facing the country; 76 percent want immigration reduced.”

Even if immigration brought unequivocal economic benefits (it doesn’t), even if migrant communities had integrated smoothly into British society (they haven’t), mass immigration has always been contrary to the wishes of a clear majority. The historic contempt of the British political class for the concerns of ordinary people is breath-taking.

2) Next time someone calls you a filthy racist for expressing misgivings over Islamic migration, remind them of this gem from that notorious little Englander, Roy Jenkins:

“In retrospect, we might have been more cautious about allowing the creation in the 1950s of such substantial Muslim communities here.”

Jenkins ranks among the great villains of post-war British history, an ivory tower lunatic whose actions did so much to weaken the fabric of this society. Yet even he came to see that his “commitment to liberalism could not be reconciled to his commitment to the mass immigration he helped create.”